Evaluation module for contactless, Hall-effect variable-speed trigger with external field protection


Order now


This evaluation module (EVM) uses Hall-effect sensors to implement a trigger that outputs a varying voltage based on how far the trigger is pressed. The EVM uses a contactless approach that reduces wear and tear compared to traditional mechanical-based triggers, thereby improving product lifetime. Low-power Hall-effect switches are used along with a load switch to keep the system in a low power standby mode when the trigger is not pressed. In addition, an optional magnetic field protection feature is available that disables the voltage output when a strong, external magnetic field is present.

  • Up to 10 mm of trigger displacement translated to voltage
  • Measured voltage error <3% without calibration and <0.5% with calibration
  • (Optional) disables voltage output when strong external magnetic fields are detected
  • Operates from AAA batteries or 5-30 V external power supply
  • Low system current consumption in sleep mode (3.5-6.9 µA, depending on selected protection level against external magnetic fields)
Hall-effect latches & switches
DRV5032 Low power (5 Hz, <1µA), low voltage (up to 5.5V) switch


Linear & low-dropout (LDO) regulators
TPS709 150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable


Linear Hall-effect sensors
DRV5056 Ratiometric unipolar linear hall effect sensor with analog output


Load switches
TPS22917 5.5-V, 2-A, 80-mΩ , 10-nA leakage load switch adj. rise time and adj output discharge


NAND gates
SN74AUP1G00 Single 1-input, 0.8-V to 3.6-V low power NAND gate SN74HCS00 4-ch, 2-input, 2-V to 6-V low power NAND gates with Schmitt-trigger inputs
Download View video with transcript Video

Order & start development

Evaluation board

HALL-TRIGGER-EVM — Evaluation module for contactless, Hall-effect variable-speed trigger with external field protection

Log in to order
In stock / Out of stock
Not available on TI.com
TI's Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 3
Type Title Date
* User guide HALL-TRIGGER-EVM User's Guide PDF | HTML 15 Dec 2021
Design guide Contactless, Hall-Effect Variable-Speed Trigger Ref. Des. W/ External Field Prot PDF | HTML 17 Dec 2021
Certificate HALL-TRIGGER-EVM EU RoHS Declaration of Conformity (DoC) 11 Nov 2021

Related design resources

Reference designs

TIDA-060032 Contactless, Hall-effect variable-speed trigger reference design with external field protection

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​